John murray



J. MURRAY.

DIE DEVICE FOR THE FORMATION OF PAPER-FASTENERS- APPLIGATION FILED MAY I5, 1918.

1,320,266. Patented 00. 28,1919.

' f 'I'GJ, 0 )7? F ag JOHN Manna a TTaR WS KY JOHN MURRAY, OF EDINBURGH, SCOTLAND.

DIE DEVICE FOR THE FORMATION OF PAPER-FASTENERS.

Specification of Letters Patent.

Patented Oct. as, 1919.

Application filed. May 15, 1918. Serial No. 234,762.

' To all whom it may concern: j

Be it known that I, JOHN MURRAY, a

subject of the King of Great Britain and Ireland, and, a resident of Edinburgh, Scotland, have invented a certain neW and useful Die Device for the Formation of Paper- Fasteners and the like, of Which the fol lowing is the specification.

The invention has for its object to provide an improved die device for the formation of paper fasteners and the like forming the subject matter of a concurrent application for a patent Serial No. 205,203, filed December 3, 1917. Such fasteners are principally intended for use in securing together temporarily or otherwise loose sheets of letterpress or the like by way of apertures pierced in the sheets and such as to maintain alinement of the sheets and also permit of the securing of them together or of the securing upon them of a temporary cover. The improved devices are of particular advantage as a means for the preliminary securing of the pamphlets or parts in connection with the loose-leaf binder which forms the subject-matter of my prior Patent No.

The fastening device referred to comprises a tubular body part adapted to fit within the apertures (of which there are of course two or more) in the sheets, andlug parts extending preferably diametrally and axially from the ends thereof which lug parts are finally folded over upon the sheets having first been pressed through the temporary cover-if there be such. The lugged tubular fastener is formed from at rectan gular blank of thin sheet metal or other suitable material the width of which is substantially equal to the thickness of the block of sheets it is desired to secure, while its length is approximately equal jointly to the circumference and diameter of the apertures in the sheets. At one end and at opposite sides of this rectangular blank there outstand the lugs before referred to, which lugs are rather less in width than the diameter of the apertures and are of a length adequate for convenient folding over. The blank, thus of T-form is preferably punched from a strip or ribbon.

According to this invention the fastener is produced from a stamping of this form in a die having a cylindrical aperture of the dimensions of the finished fastener and a coacting concentric mandrel of lesser diamsuitable material.

eter. In the die is a lateral slot, and in the mandrel a diametral slot. The end of the stamping on which are thelugs is passed through the slot in the die, so that that end with the lugs lies within the slot in the mandrel. The mandrel is rotated, so rolling the stamping into cylindrical form within the die, and is then withdrawn and thefinished fastener removed from it.

In the accompanying sheet of explanatory drawing Figure l is a plan and Fig. 2 a side elevation showing the blank from Which the improved fastener is formed, Fig. 3 being an elevation and Fig. 4 a plan of the completed fastener, While Fig. 5 is a plan and Fig. 6 a transverse section of the die and allied parts-all the views being on an enlarged scale.

As shown in Figs. 3 and 4 of the drawings the improved fastener comprises a tubular body part A adapted to fit within each aperture in a series of loose leaves, and lug parts B, C extending diametrically and axi- "ally from the ends thereof. Thes lug parts are finally folded over upon the sheets, hav

ing first been pressed through the temporary cover, if there be such.

As shown in Figs. 1 and 2 this improved tubular fastener is formed from a rectangular blank D of thin sheet metal or other The Width of this blank is substantially equal to the thickness of the block of sheets it is desired to secure, while its length is approximately equal jointly to the circumference and diameter of the aperture in the sheets. At one end and at opposite sides of this rectangular blank D there outstands the lugs B, C, hereinbefore referred to. These lugs are rather less in width than the diameter of the aperture and are of a length adequate for convenient folding over.

This T-shaped form of blank is punched from a strip or ribbon of metal by a die E and punch G shown in Figs. 5 and 6. The die E has in it a cylindrical aperture H of the dimensions of the finished fastener.

With this aperture there coacts a mandrel J.

of lesser diameter. In the die is a lateral slot K and in the mandrel a diametral slot L. The end of the stamping D on which are the lugs B, C, is passed through the slot K in the die so that that end with the lugs may lie within the slot L in the mandrel. A pin M is inserted into an aperture M in the die E so as to cause the stamping D,

after it has been punched from the strip or ribbon, to travel along the bottom of the die E the necessary distance to cause the lug parts thereof to enter the slot L in the mandrel. The mandrel J is then rotated, so rolling the stamping D into cylindrical form around the mandrel and within the aperture H in the die. The mandrel J is then withdrawn and the finished fastener A removed from it.

It will be seen that the improved fastener very effectively binds together a series of loose leaves, and it may be a cover, in suchwise that while cover and leaves may be readily removed, the Whole can be freely handled Without fear of their inadvertent detachment.

What I claim is 1. A die device for the formation of paper fasteners and the like, comprising a die block, a cooperating punch, a rotatable mandrel arranged to one side of the punch, a cylindrical aperture in the die block for the mandrel and of the external diameter of the fastener, the mandrel being of lesser diameter than the aperture, a lateral opening in the die block communicating with the cylindrical aperture, a diametral slot in the mandrel, and means to cause the end of the blank to enter within this diametral slot prior to rotation of the mandrel and the winding of the blank thereon, as described.

2. A die device for the formation of paper fasteners and the like, comprising a die and punch shaped to produce a blank with marginal lugs at one end, a cylindrical aperture of the dimensions of the finished fastener in the die, a mandrel of lesser diameter than the aperture in the die, a lateral slot in the die communicating with the cylindrical aperture, said mandrel being pierced by a diametral slot adapted to be brought into register with the slot in the die, means to cause the blank after it has been stamped out to so travel in the stationary die that the end with the lugs lies within the slot in the mandrel, and means to rotate the mandrel, as described.

3. In apparatus of the type described, a die and cooperating punch, a slotted roll arranged to one side of the die, and a passageway from the bottom of the die well opening to the slot in the roll, through which passageway the margin of the struck blank may be passed into the slot in the roll.

4. In apparatus of the type described, a die and cooperating punch, a slotted roll arranged to one side of the die, and a passageway from the bottom of the die well opening to the slot in the roll, through which passageway the margin of the struck blank may be passed into the slot in the roll, said die being recessed on its opposite side to guide a blank-shifter.

5. In apparatus of the type described, a die recessed to form, with a cooperating punch, a sheet metal blank, a cylindrical recess in the die located to one side of the blanking recess and having its axis substantially alined with the bottom of the latter, in combination with a rotating mandrel sliding longitudinally in said cylindrical recess and transversely slotted to receive a portion of the blank, roll the remainder of the blank around the mandrel in the cylindrical recess, and withdraw the thus formed blank from the die, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN MURRAY.

Witnesses:

HELEN SUTHERLAND, BERNARD F. HALE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

